kshafer;75079 said:Thanks Bill. I was hoping a dirt guy would chime in. After 4 years is the gravel still on top of the soil or does it become mixed over time?
aquabillpers;75089 said:The gravel stays on top of the soil. It doesn't mix in with it. Note that it is 2mm to 3mm in diameter.
BTW, in other long-term soil tanks that I've torn down I've noted that the cheap topsoil that they were started with had become a clay-like substance. nothing like the original. I don't know what that is or why it happened, but there was little if any clay in the original soil. Maybe someone who reads this can shed some light?
Tom Barr;75130 said:All the easier to oxidize materials, peat, bark etc, was chewed up slowly.......leaving nothing but clay.
aquabillpers;75142 said:OK, thanks.
The volume of the "clay" looks to be about same the as that of the original soil (which did not show "clay" as an ingredient), so I guess some kind of a chemical reaction took place?
Since the original nutrients in the soil have been eaten, does that mean that the plants are totally dependent on fish waste and other detritus? If so, those fish are real fertilizing machines!
This is a little deep for sand. It builds up bacteria that can harm your tank.I have about 3 inches of pool filter sand.
This should be plenty of light for that tank.I recently purchased a T5HO 2x36 watt
osmocote pellets with instruction to freeze and use that way etc.